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Battery ground strap. Porsche 924 / 944 / 911 Turbo flatnose - 477971221
477971221/1
Vehicle Group
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
Information
Battery ground strap
This OE Match battery ground strap is a replacement earth strap used to connect the battery negative terminal to the vehicle body or chassis ground point. It is designed to match the original-style function and fitment for Porsche 924, 944, and 911 Turbo Flatnose models where this part number is specified.
Fits:
Porsche 924 - 1976 to 1985
Porsche 944 2.5ltr - 1982 to 1985
Porsche 911 turbo "Flatnose" - 1987 to 1989
Diagram ref no 5 (for 911) / 10 (for 924 / 944)
This battery ground strap fits at the battery area, connecting the negative battery terminal to the body or chassis earth point. Depending on the model, it may be located in the front battery compartment or battery mounting area as part of the main vehicle grounding system.
The battery ground strap provides the main electrical return path from the vehicle body back to the battery. A strong and clean ground connection is essential for reliable starting, charging, lighting, instruments, and general electrical system performance.
Functions
• Connects the battery negative terminal to the body or chassis ground point
• Completes the electrical circuit for the starting and charging systems
• Helps provide stable voltage to electrical components
• Supports reliable starter motor operation
• Helps prevent intermittent electrical faults caused by poor grounding
• Restores the correct battery earth connection during repair or restoration
• OE Match replacement for worn, corroded, or damaged original ground strap
Battery ground straps can corrode, fray, loosen, or develop high resistance over time. A weak earth connection can cause slow cranking, starting problems, dim or flickering lights, charging issues, erratic gauges, or intermittent electrical faults. Replacing the ground strap helps restore a secure electrical connection and improves overall reliability.
When to replace
• The original ground strap is corroded, frayed, cracked, or damaged
• The battery negative connection is loose or heavily oxidised
• The car has slow cranking or intermittent starting issues
• Lights, instruments, or electrical systems behave erratically
• Charging or voltage-related faults are present
• The ground strap becomes hot under electrical load
• The vehicle is undergoing battery, wiring, or restoration work
• The original strap is missing or no longer provides a reliable ground
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477971221
The product you are viewing cross references to these numbers
This OE Match battery ground strap is a replacement earth strap used to connect the battery negative terminal to the vehicle body or chassis ground point. It is designed to match the original-style function and fitment for Porsche 924, 944, and 911 Turbo Flatnose models where this part number is specified.
Fits:
Porsche 924 - 1976 to 1985
Porsche 944 2.5ltr - 1982 to 1985
Porsche 911 turbo "Flatnose" - 1987 to 1989
Diagram ref no 5 (for 911) / 10 (for 924 / 944)
This battery ground strap fits at the battery area, connecting the negative battery terminal to the body or chassis earth point. Depending on the model, it may be located in the front battery compartment or battery mounting area as part of the main vehicle grounding system.
The battery ground strap provides the main electrical return path from the vehicle body back to the battery. A strong and clean ground connection is essential for reliable starting, charging, lighting, instruments, and general electrical system performance.
Functions
• Connects the battery negative terminal to the body or chassis ground point
• Completes the electrical circuit for the starting and charging systems
• Helps provide stable voltage to electrical components
• Supports reliable starter motor operation
• Helps prevent intermittent electrical faults caused by poor grounding
• Restores the correct battery earth connection during repair or restoration
• OE Match replacement for worn, corroded, or damaged original ground strap
Battery ground straps can corrode, fray, loosen, or develop high resistance over time. A weak earth connection can cause slow cranking, starting problems, dim or flickering lights, charging issues, erratic gauges, or intermittent electrical faults. Replacing the ground strap helps restore a secure electrical connection and improves overall reliability.
When to replace
• The original ground strap is corroded, frayed, cracked, or damaged
• The battery negative connection is loose or heavily oxidised
• The car has slow cranking or intermittent starting issues
• Lights, instruments, or electrical systems behave erratically
• Charging or voltage-related faults are present
• The ground strap becomes hot under electrical load
• The vehicle is undergoing battery, wiring, or restoration work
• The original strap is missing or no longer provides a reliable ground
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
477971221
477971221
The product you are viewing cross references to these numbers
Price: £22.00
In stock
Also found on these pages
Related products
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Battery Straps, Top And Side Set, SILVER.
Restore the original appearance and secure mounting of your classic Porsche battery with this OE Match Battery Straps – Top and Side Set (Silver). Manufactured as a direct replacement for 90161102800/2, this complete strap set is designed to hold the battery firmly in place while providing the authentic silver finish found on many classic Porsche models.
Fits:
Battery retaining straps are essential for preventing battery movement caused by vibration, braking, and cornering. Over time, the original straps can become corroded, bent, weakened, or damaged, reducing their ability to secure the battery safely. This OE Match replacement set restores both functionality and the correct factory-style appearance, making it ideal for maintenance and concours-quality restorations.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161102800
The product you are viewing cross references to these numbers
Restore the original appearance and secure mounting of your classic Porsche battery with this OE Match Battery Straps – Top and Side Set (Silver). Manufactured as a direct replacement for 90161102800/2, this complete strap set is designed to hold the battery firmly in place while providing the authentic silver finish found on many classic Porsche models.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Battery retaining straps are essential for preventing battery movement caused by vibration, braking, and cornering. Over time, the original straps can become corroded, bent, weakened, or damaged, reducing their ability to secure the battery safely. This OE Match replacement set restores both functionality and the correct factory-style appearance, making it ideal for maintenance and concours-quality restorations.
What This Product Does:
- Secures the battery firmly within the battery tray.
- Prevents battery movement during driving.
- Helps protect the battery terminals and cables from unnecessary strain.
- Reduces vibration that can shorten battery life.
- Maintains the correct positioning of the battery.
- Restores the original factory appearance with a silver finish.
- Replaces worn, corroded, or damaged battery retaining straps.
Symptoms Of Wear Or Failure:
- Corrosion or rust on the battery straps.
- Bent or distorted retaining straps.
- Loose battery movement within the battery tray.
- Broken or weakened retaining hardware.
- Missing top or side retaining straps.
- Difficulty tightening or securing the battery.
- Excessive battery vibration while driving.
- Wear marks around the battery tray caused by movement.
- Battery cables under excessive tension due to battery movement.
- A poor or deteriorated appearance during restoration.
Why Replacement Matters:
- A securely mounted battery is essential for both safety and reliability. If the battery is able to move, vibration can damage the battery casing, place excessive strain on the terminals and cables, and increase the risk of electrical faults. In severe cases, battery movement may result in cracked casings, acid leaks, or short circuits.
- Replacing worn or corroded battery straps ensures the battery remains securely positioned, helping to protect the electrical system and improve long-term reliability. A new OE Match silver strap set also restores the correct period appearance, making it an ideal finishing detail for classic Porsche restoration projects while maintaining an authentic factory look.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161102800
90161102800
90161102200
The product you are viewing cross references to these numbers
Price: £29.95
In stock
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
Information
Battery tray, lower.
Fits:
Porsche 911 1965-68
Porsche 912 1965-68
Click 'Zoom in' for large parts diagram.
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161123120
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1965-68
Porsche 912 1965-68
Click 'Zoom in' for large parts diagram.
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161123120
90161123120
The product you are viewing cross references to these numbers
Price: £29.95
In stock
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Starter cable with original style terminals and grommets.
Fits:
Porsche 911 1965-73
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161103121
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1965-73
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161103121
90161103121
The product you are viewing cross references to these numbers
Price: £229.50
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